Efullcalendar Extention Doesn't Work On Server But Work On Localhost

hi guys i used the eullcalendar extentin in my project and it’s worked fine on localhost but when i puted the website on server iy says

The alias "application.extensions.EFullCalendar.EFullCalendar" is invalid. Check that points to an existing PHP file.

also when i use ext.EFullCalendar.EFullCalendar it doesn’t work did anyone had the same problem with an extension !!

Is production server Linux? Development server windows? If production server is Linux, check capitalization on the folder structure. In linx caps matter, windows…not so much

also check permissions.